Please critique my designed workout

I've been running 5/3/1 for the past few months and have really enjoyed the gains from it.. However, since doing this program my arm size has decreased noticeably..The lack of direct arm work I feel is the cause.On rowing movements, I feel that the bi's and forearms go too soon before the back.. Even with all the rowing and pressing, I haven't added any size (w/ a 500 cal surplus). I've gained about 10 pounds since July but most of its in my upper back and chest area.. I was thinking 5 days/week, 4 of them hitting my main compound first for a 5x5, then some volume work. Each successive week, I'd change the rep range from 5x5 to 5x3, then 3,3,3,1,1 then 5x1, followed by a deload.
Here's a quick example:
Week 1 day 1: Chest
Flat Bench 5x5 @85%
Incline Bench 4x8-12
Pec Deck/Flies 3x8-12
Curling movement 4x6-8
Farmers Walk or other forearm work

Now for week 2, the only thing that will change is the reps for the first lift, and perhaps increasing the total volume of accesory work a little each week..For my deload weeks, I think I'll do a straight BB type of workout with decreased volume but everything 12-15 reps..
Also, I've been back and forth between the rep ranges for arm work.. I'd like to increase my total capacity for bi's and tri's as I feel that after 4 sets of 6-8 my bi's feel gassed.. So Perhaps on the arms day, make most of it in the 8-12 rep range, but the arm work I do on the other days is still medium rep..Constructive advice and opinions are welcome.

Ok why not follow PHAT? If you are worried more for looks, and want to train 5x a week it would be pretty good for you bro. My concern here is that you are exposing yourself to injuries training like this, too much shoulder involvement in the week , not enough lower body days and also dead lifts are not an upper back movement at all bro! They are a lower body, posterior chain , hip dominant motion. Check out PHAT by layne norton, it might be best for yah if you want the arm and overall growth and worry not much about the strength gains!

Ok why not follow PHAT? If you are worried more for looks, and want to train 5x a week it would be pretty good for you bro. My concern here is that you are exposing yourself to injuries training like this, too much shoulder involvement in the week , not enough lower body days and also dead lifts are not an upper back movement at all bro! They are a lower body, posterior chain , hip dominant motion. Check out PHAT by layne norton, it might be best for yah if you want the arm and overall growth and worry not much about the strength gains!

I second this PHAT is a great 5 day a week split and it hits both goals strength and hypertrophy.

Third on p.h.a.t. I started doing that 7 months ago and modified a needed, and it is by far the best training program I've tried...plus it doesn't get boring...I've gained about 12 pounds on a lean bulk since I've started...